Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '719b9509da9b428180ff9de0b371479598f182577056a1ada3e7cdf5e115ec0a' 
  AND token = '4Uk9U85MgA+SH/30sGuH6b9R3WsNhjH6uJ9NeDOnyVg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}